Standards Informanthttp://blog.siemon.com/standards
Your Guide to Network Cabling and Data Center StandardsFri, 04 Nov 2016 19:11:07 +0000enhourly1http://wordpress.org/?v=3.2.1Bundling Recommendations for PoE Applicationshttp://feedproxy.google.com/~r/StandardsInformant/~3/EVS3usOpXWQ/siemon-cable-bundling-recommendations-for-poe-applications
http://blog.siemon.com/standards/siemon-cable-bundling-recommendations-for-poe-applications#commentsFri, 04 Nov 2016 16:22:50 +0000Valerie Maguirehttp://blog.siemon.com/standards/?p=2126[...]]]>It is well understood that deploying 30 W and higher remote powering applications, such as Power over Ethernet (PoE) and Power over HDBaseT (POH), over balanced twisted-pair cabling produces a small degree of heat build-up within bundled horizontal cables. This heat build-up does not affect safety, but can affect transmission performance and long-term mechanical reliability. This can vary over differing cable categories and constructions as, for example, cables with larger conductors inherently have less heat build-up due to lower resistance and cables with metallic elements have less heat build-up due to superior heat dissipation properties. Different pathway styles (i.e. conduit versus free air) can also affect heat build-up within cable bundles.

Managing cable bundle size is important to ensure that heat build-up does not exceed the mechanical rating of the cables and that appropriate channel length de-rating is applied to offset additional insertion loss due to increased ambient temperature. While ISO/IEC TR 29125 and TIA TSB-184-A are under development to address recommendations for cabling supporting remote powering applications, these technical bulletins are generic in nature and not directly applicable to Siemon cables, which, depending on cable type, can support higher mechanical temperature ratings and offer superior heat dissipation.

The table below depicts recommended bundle sizes for Siemon horizontal cables supporting a variety of remote powering applications. Note that these bundling recommendations are applicable to cables installed in all pathway types, so they are more conservative than would be specified for cables in free air (i.e. non-conduit) installations. Consult the infrastructure design experts at Siemon for information on bundle size recommendations for cables installed in open pathways.

When in doubt about cable mechanical or heat dissipation capability, installation environment, or remote powering application, a conservative practice is to limit maximum bundle size to 24 cables. With the exception of the few instances noted below, this easy to remember practice addresses the majority of media, environmental, and application scenarios.

Q: Will the installed base of category 5e and 6 cabling support 2.5G/5GBASE‑T? 2.5G/5GBASE‑T operates over “defined use cases and deployment configurations” of category 5e/class D and category 6/class E cabling. Neither 2.5G nor 5GBASE-T are intended to operate over the entire installed base of category 5e/class D and category 6/class E cabling.

Q: How will I know if my installed category 5e or category 6 cabling plant will support 2.5G/5GBASE-T? TIA is developing TSB-5021 and ISO/IEC is developing ISO/IEC TR 11801-9904 to address the evaluation of installed category 5e/class D and category 6/class E cabling for possible support of 2.5GBASE-T and 5GBASE-T. Extended frequency characterization (i.e. performance above 100 MHz for category 5e/class D cabling), signal to alien crosstalk assessment, and additional field test qualification measurements will be described within these documents. It is important to keep in mind that these field assessment methods are still under development and will likely prove to be very time-consuming and onerous to implement and may not be fully conclusive.

Q: Is 2.5G/5GBASE-T operation covered by Siemon’s category 5e and category 6 system warranties? Because support of 2.5G/5GBASE-T by category 5e/class D and category 6/class E cabling is dependent upon environmental (e.g. alien noise levels) and installation (e.g. channel length and cable bundling) conditions, Siemon can only guarantee support of the 2.5GBASE-T and 5GBASE-T applications with category 6A/class EA and higher performing cabling systems.

Q: What grade of cabling should be installed to ensure guaranteed support of 2.5G/5GBASE-T? Siemon recommends that category 6A/class EA and higher grades of cabling be specified to support all new IEEE Std 802.11ac™-2013 based enterprise wireless access point uplink connections, even if it is anticipated that 2.5GBASE-T or 5GBASE-T equipment will be deployed. A recommendation to install category 6A/class EA or better cabling for all new installations intended to support 2.5G/5GBASE-T also appears in the developing TSB-5021 and ISO/IEC TR 11801-9904 drafts. Since category 6A/class EA and higher performing cabling is also guaranteed to support 10GBASE‑T, this design approach maximizes the lifecycle of the cabling infrastructure.

Support a BER of better than or equal to 10-12 at the MAC/PLS service interface (or the frame loss ratio equivalent)

Support optional Energy-Efficient Ethernet operation

Provide physical layer specification which support 25 Gb/s operation over at least 10 km on SMF

Provide physical layer specification which support 25 Gb/s operation over at least 40 km on SMF

Provide appropriate support for OTN

]]>http://blog.siemon.com/standards/ieee-p802-3cc-25-gbs-ethernet-over-single-mode-fiber-task-force/feed0http://blog.siemon.com/standards/ieee-p802-3cc-25-gbs-ethernet-over-single-mode-fiber-task-forceISO/IEC TR 11801-9901 Generic Cabling for Customer Premises – Part 9901: Guidance for Balanced Cabling in Support of at Least 40 Gbit/s Data Transmissionhttp://feedproxy.google.com/~r/StandardsInformant/~3/KgOA6_1r4xE/isoiec-tr-11801-9901-generic-cabling-for-customer-premises-part-9901-guidance-for-balanced-cabling-in-support-of-at-least-40-gbits-data-transmission
http://blog.siemon.com/standards/isoiec-tr-11801-9901-generic-cabling-for-customer-premises-part-9901-guidance-for-balanced-cabling-in-support-of-at-least-40-gbits-data-transmission#commentsWed, 05 Oct 2016 19:58:28 +0000Valerie Maguirehttp://blog.siemon.com/standards/?p=1976[...]]]>Early in the 40GBASE-T Ethernet application development process, it became understood that cabling specified to a bandwidth greater than 1,000 MHz would be required to support 40 Gb/s and higher transmission speeds. This informative International Technical Report provides initial guidelines for next generation channels specified to 1,600 MHz. It has subsequently been determined that cabling specified to 2,000 MHz is required to support both 25GBASE-T and 40GBASE-T.

ISO/IEC TR 11801-9901 “Generic Cabling for Customer Premises – Part 9901: Guidance for Balanced Cabling in Support of at Least 40 Gbit/s Data Transmission” was developed by ISO/IEC JTC 1/SC 25 (Subcommittee 25: Interconnection of Information Technology Equipment, of ISO/IEC Joint Technical Committee 1: Information Technology) and published in October, 2014. This Technical Report provides performance for class I and class II balanced twisted-pair cabling containing two connections and up to 30 m of cords and cable specified from 1 to 1,600 MHz. The contents of this report have been superseded by ISO/IEC 11801-1.

ISO/IEC TR 11801-9901 Content

Channel Requirements using Components with Enhanced Performance and Extended Frequency (Class I and Class II)

Channel Requirements for Category 6A and Category 7A Components

Annexes addressing Assessment of Cabling Capacity for 40 Gbit/s and Characterisation of a Channel using Standardised Components with Extended Frequency

ISO/IEC TR 11801-9901 Channel Descriptions

Class I channels are constructed from two Category 8.1 connectors, up to 26m of Category 8.1 cable and, two 2m Category 8.1 cords

Class II channels are constructed from two Category 8.2 connectors, up to 26m of Category 8.2 cable and, two 2m Category 8.2 cords

ISO/IEC 11801-1 “Generic Cabling for Customer Premises – Part 1: General Requirements” is currently under development by ISO/IEC JTC 1/SC 25 (Subcommittee 25: Interconnection of Information Technology Equipment, of ISO/IEC Joint Technical Committee 1: Information Technology) and anticipated to publish in early 2017. This Standard will cancel and replace 11801 Edition 2.2.

Significant changes from the previous edition include:

Class I and II channel and link requirements have been added

Category 8.1 and 8.2 connecting hardware and cord requirements have been added

Cabled OM1, OM2, and OS1 optical fibre is no longer recommended for new installations

The general functional elements specified in ISO/IEC 11801-1 are the terminal equipment (TE) outlet, consolidation point (CP), subsystem cable 1 (divided into cable Y and cable Z if a consolidation point is present), distributor 1, other subsystem cables (e.g. 2, 3 and 4), and other distributors (e.g. 2, 3 and 4).

ISO/IEC 11801-1 Environmental Classification

1 = commercial, 2 = light industrial, 3 = industrial

]]>http://blog.siemon.com/standards/isoiec-11801-1-generic-cabling-for-customer-premises-part-1-general-requirements/feed0http://blog.siemon.com/standards/isoiec-11801-1-generic-cabling-for-customer-premises-part-1-general-requirementsTIA Approves Category 8 Addendum for Publicationhttp://feedproxy.google.com/~r/StandardsInformant/~3/vNNgWqk-xH0/tia-approves-category-8-amendment-for-publication
http://blog.siemon.com/standards/tia-approves-category-8-amendment-for-publication#commentsWed, 15 Jun 2016 23:29:11 +0000Valerie Maguirehttp://blog.siemon.com/standards/?p=1924[...]]]>The TIA TR-42.7 Copper Cabling Subcommittee approved ANSI/TIA‑568‑C.2‑1, “Specifications for 100Ω Category 8 Cabling” for publication in June, 2016. Category 8 cabling is a shielded balanced twisted-pair media type constructed from category 8 components and designed to support the 25GBASE‑T and 40GBASE‑T applications currently under development by the IEEE P802.3bq 25G/40GBASE-T Task Force. ANSI/TIA‑568‑C.2‑1 specifies mechanical and transmission requirements and laboratory and field test verification methods for a two connector, 30 meter channel, which is an optimized topology for making server to switch connections in middle-of-row and end-of-row data center deployments. Category 8 transmission parameters are specified over the frequency band of 1 MHz to 2 GHz.

Copies of the Standard may be purchased from the IHS Standards Store (http://global.ihs.com) after publication.

]]>http://blog.siemon.com/standards/tia-approves-category-8-amendment-for-publication/feed0http://blog.siemon.com/standards/tia-approves-category-8-amendment-for-publicationThe 2016 Ethernet Alliance Roadmap has Arrivedhttp://feedproxy.google.com/~r/StandardsInformant/~3/QPMKqBv7d3A/ethernet-alliance-launches-2106-ethernet-alliance-roadmap
http://blog.siemon.com/standards/ethernet-alliance-launches-2106-ethernet-alliance-roadmap#commentsFri, 10 Jun 2016 14:20:27 +0000Valerie Maguirehttp://blog.siemon.com/standards/?p=1539[...]]]>The Ethernet Alliance is a global consortium of system and component vendors, industry experts, and university and government professionals who are committed to the success and expansion of Ethernet technology. The mission of the Ethernet Alliance is to support Ethernet technology through activities such as interoperability demonstrations and educational programs and materials.

The Ethernet Alliance recently released their 2016 Ethernet Roadmap, which shows historical application speeds leading to the latest developments in Ethernet and progressing to estimates for what future speeds may become available and when. The roadmap includes new technologies such as Flexible Ethernet (FlexE), new optical modules, and 4-Pair Power over Ethernet (PoE) and summarizes common Ethernet interfaces and nomenclature. Highlights from the 2016 Ethernet Roadmap include:

Hyperscale data centers drive amazing Ethernet volumes when hundreds of thousands of servers are connected on one site

Ethernet is being deployed in automobiles and will become the de facto standard for automobile networks by 2020

Most homes have wireless access points (WAPs) with 4 or more Ethernet ports

Greater than Terabit per second (Tb/s) Ethernet transmission speed capability is predicated for the near future

]]>http://blog.siemon.com/standards/ethernet-alliance-launches-2106-ethernet-alliance-roadmap/feed0http://blog.siemon.com/standards/ethernet-alliance-launches-2106-ethernet-alliance-roadmapIEEE Std 802.3bw-2015: 100BASE-T1http://feedproxy.google.com/~r/StandardsInformant/~3/C47LPHQV97M/ieee-std-802-3bw-2015-100base-t1
http://blog.siemon.com/standards/ieee-std-802-3bw-2015-100base-t1#commentsThu, 09 Jun 2016 16:55:52 +0000Valerie Maguirehttp://blog.siemon.com/standards/?p=1508[...]]]>IEEE Std 802.3bw™ ”IEEE Standard for Ethernet Amendment 1: Physical Layer Specifications and Management Parameters for 100 Mb/s Operation over a Single Balanced Twisted Pair Cable (100BASE-T1)” was developed by the IEEE P802.3bw 100BASE‑T1 Task Force and approved by the IEEE-SA Standards Board on October 26, 2015. This amendment defines the Physical Layer (PHY) specifications and management parameters for point-to-point full duplex 100 Mb/s Ethernet operation over single balanced twisted-pair cabling on a lower-performance channel. This application is targeted for deployment in automotive, industrial, and other environments that will benefit by a reduction in the number of wire pairs and magnetics.

The link segment for a 100BASE-T1 PHY system consists of up to 15 m of ruggedized single balanced twisted-pair cabling, with up to four in-line connectors and two mating connectors. The mechanical interface to the balanced cabling is a 2-pin connector or two pins of a multi-pin connector, which is not specified by the amendment. All cabling and mechanical interfaces are required to perform in environmentally stressful conditions as defined by referenced ISO General Load, Electrical Load, Mechanical Load, Climatic Load, and Chemical Load specifications.

Goals and Objectives for 100BASE‑T1 operation:

Support 100 Mb/s operation in automotive environments (e.g. EMC, temperature) over a single balanced twisted-pair

Support fast-startup operation using predetermined configurations which enables the time from power_on**=FALSE to a state capable of transmitting and receiving valid data to be less than 100ms

Support optional operation with run-time configuration, that specifies a maximum allowable time from power_on**=FALSE to a state capable of transmitting and receiving valid data

The resulting standard will not preclude single pair auto-negotiation

Define the performance characteristics of a link segment and a PHY to support point-to-point operation over this link segment with single twisted‑pair supporting up to four inline connectors using balanced cabling for at least 15 m reach

]]>http://blog.siemon.com/standards/ieee-std-802-3bw-2015-100base-t1/feed0http://blog.siemon.com/standards/ieee-std-802-3bw-2015-100base-t1TSB-5019: High Performance Structured Cabling Use Cases for Data Centers and Other Premiseshttp://feedproxy.google.com/~r/StandardsInformant/~3/-eZNmXOTwgw/tsb-5019-high-performance-structured-cabling-use-cases-for-data-centers-and-other-premises
http://blog.siemon.com/standards/tsb-5019-high-performance-structured-cabling-use-cases-for-data-centers-and-other-premises#commentsWed, 08 Jun 2016 16:36:00 +0000Valerie Maguirehttp://blog.siemon.com/standards/?p=1475[...]]]>TIA category 8 (or alternatively, ISO/IEC class I or class II) cabling is required to support 25GBASE-T and 40GBASE-T. Unlike all other BASE-T Ethernet applications developed for deployment over balanced twisted-pair cabling, 25GBASE-T and 40GBASE-T is specifically designed for operation over a short reach 30m channel topology containing only 2 connectors to facilitate server-to-switch or switch-to-switch connections.

TSB-5019 “High Performance Structured Cabling Use Cases for Data Centers and Other Premises” was developed by the TIA TR-42.7 Copper Cabling Subcommittee and published in April, 2015. This forward looking document provides guidance and use information regarding support of 25GBASE-T and 40GBASE-T with category 8 structured cabling in data center and other environments.

TSB-5019 Content

BASE-T Advantages

Comparison of Data Center Cabling Architectures

Comparison of Installation Components

Objectives of Category 8 Cabling

Data Center Twisted-Pair Migration Path

Use Cases for Category 8 and Next Generation BASE-T

Types of Data Center Cabling Architectures

Centralized: Access switches are located in common or central locations and structured cabling is used to connect these switches to servers

End-of-Row/Middle-of-Row: Access switches are located within the row and structured cabling is used within the row to connect these switches to servers

Top-of-Rack: Access switches are located at the top of each cabinet and point-to-point cabling is used to connect these switches to servers